Message-ID: <1616575.x8rWiILC8l@pali>
Date:	Fri, 16 Aug 2013 09:14:29 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Martin Peres <martin.peres@...ri.fr>
Cc:	David Airlie <airlied@...ux.ie>, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Ben Skeggs <bskeggs@...hat.com>
Subject: Re: nouveau: temperature on nv40 is unavailable since ad40d73ef533ab0ad16b4a1ab2f7870c1f8ab954

On Thursday 15 August 2013 18:21:51 Martin Peres wrote:
> On 15/08/2013 03:24, Pali Rohár wrote:
> > On Thursday 15 August 2013 04:07:24 Martin Peres wrote:
> >> On 14/08/2013 05:02, Pali Rohár wrote:
> >>> On Tuesday 13 August 2013 15:55:28 Martin Peres wrote:
> >>>> On 13/08/2013 09:53, Pali Rohár wrote:
> >>>>> On utorok, 13. augusta 2013 15:32:45 CEST, Martin Peres
> >>> 
> >>> wrote:
> >>>>>> On 13/08/2013 09:23, Pali Rohár wrote:
> >>>>>>> On Tuesday 13 August 2013 09:01:19 Martin Peres wrote:
> >>>>>>    ...
> >>>>>> 
> >>>>>> You can check the temperature by running nvidia-settings.
> >>>>>> If you can't see the temperature in it, then nvidia
> >>>>>> doesn't support it on your card and
> >>>>>> I'm not sure we should :s
> >>>>>> 
> >>>>>> Thanks for the vbios you sent me in private. For the
> >>>>>> others, the reason why he doesn't have temperature
> >>>>>> anymore is because his vbios lacks sensor calibration
> >>>>>> values.
> >>>>> 
> >>>>> In nvidia-settings tab "GPU 0 - (GeForce 6600 GT)" -->
> >>>>> "Thermal Settings" is:
> >>>>> 
> >>>>> Thermal Sensor Information:
> >>>>> ID: 0
> >>>>> Target: GPU
> >>>>> Provider: GPU Internal
> >>>>> Temperature: 70 C (now)
> >>>>> 
> >>>>> I looked in Windows program SpeedFan. It found Nvidia PCI
> >>>>> card and reported "GPU Temp" about 68-70 C. So it looks
> >>>>> like both nvidia driver and windows SpeedFan program
> >>>>> reading same values.
> >>>> 
> >>>> Great, I'll cook you a patch in a bit and you'll see what
> >>>> the temperature is like. It won't be perfectly accurate
> >>>> but there is some kind of default for nvidia cards of this
> >>>> generation.
> >>> 
> >>> Ok, send me patch and I can try it if it will work and
> >>> report similar values as windows or nvidia driver.
> >> 
> >> Sorry for the late answer.
> >> 
> >> Please test this patch. Be aware that temperature with nouveau
> >> will be higher than with the blob.
> >> I only want to see if nouveau reports a temperature.
> >> 
> >> The only way to be sure if the values are good-enough would be
> >> to use the blob and run:
> >> nvapeek 0x15b0
> >> Please send me the result along with the temperature reported
> >> by nvidia at the time of the peek.
> >> 
> >> Martin
> >> 
> >> PS: This patch has only be compile-tested, I don't have access
> >> to an nv4x right now.
> > 
> > Hello,
> > 
> > now after patch nouveau report temperature:
> > 
> > $ sensors
> > ...
> > nouveau-pci-0500
> > Adapter: PCI adapter
> > temp1:        +63.0°C  (high = +95.0°C, hyst =  +3.0°C)
> > 
> >                         (crit = +145.0°C, hyst =  +2.0°C)
> >                         (emerg = +135.0°C, hyst =  +5.0°C)
> 
> Ok, that was expected ;)
> 
> > ...
> > 
> > I found that nvidia binary driver has command line utility
> > nvidia-smi which report same temperature as X utility nvidia-
> > settings. So I will use nvidia-smi (if it is OK).
> > 
> > And after reboot nvidia report another temperature value:
> > 
> > $ nvidia-smi -q -d TEMPERATURE
> > ...
> > GPU 0000:05:00.0
> > 
> >      Temperature
> >      
> >          Gpu                     : 70 C
> > 
> > Immediately I called nvapeek command:
> > 
> > $ nvapeek 0x15b0
> > 000015b0: 1000008e
> > 
> > So value reported by nouveau is lower than value reported by
> > nvidia binary driver.
> 
> As you didn't run nvapeek 15b0 when running nouveau it is hard to tell
> if it is due to
> calibration values or because the temperature was lower.
> 

I run it and it always reported value 000000ff (also when temperature changed).

> Could you please read the temperature + peek 15b0 when running nouveau?
> 
> Anyway, it is weird because I cannot find 70°C with 0x8e as an input
> temperature and with
> the current default values :o
> 

My idea is that register does not contains temperature. Both nouveau and 
nvidia driver when show different temperature it does not show different output 
from "nvapeek 0x15b0".

Now I started computer with nouveau driver. Temperature is incresing, but 
nvapeek 0x15b0 is still same.

So do you really needs other tests with nvapeek 0x15b0? Is that register 
correct?

> > I wait some some and started nvidia-smi and nvapeek again, here
> > are results:
> > 
> > $ nvidia-smi -q -d TEMPERATURE
> > ...
> > GPU 0000:05:00.0
> > 
> >      Temperature
> >      
> >          Gpu                     : 67 C
> > 
> > $ nvapeek 0x15b0
> > 000015b0: 1000008e
> > 
> > So it looks like that nvapeek returning always same value and
> > does not depends on temperature... It is OK?
> 
> Well, it looks like the temperature reading is very noisy!
> Could you please get the temperature + peek when the card is as hot as
> possible?
> 
> There is a very effective solution to get a GPU hot, use a hair drier.
> If you could get your
> GPU to at 110°C (or less, if you feel like it is too much), that could
> help me check the formula
> and default values.
> 
> PS: I attached a new version of the patch that should improve the
> temperature accuracy for
> nv43s. Could you test it and send me your kernel log?

-- 
Pali Rohár
pali.rohar@...il.com


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